<template>
  <div class="tab-bar-item" @click="itemClick">
    <!-- 图标插槽 -->
    <div v-if="!isActive"><slot name="item-icon"></slot></div>
    <div v-else><slot name="item-icon-active"></slot></div>
    <!-- 底部文字插槽 -->
    <div :style="activeStyle"><slot name="item-text"></slot></div>
  </div>
</template>

<script>
export default {
  name: "tabBarItem",
  props: {
    // 选中的路由
    path: String,
    // 传入的颜色
    activeColor: {
      type: String,
      default: 'red'
    }
  },
  data() {
    return {
      // isActive: true
    }
  },
  computed: {
    isActive() {
      // 判断当前路由是否包含选中的路由
      return this.$route.path.indexOf(this.path) !== -1
    },
    // 如果当前路由活跃选用传入的颜色，否则为空
    activeStyle() {
      return this.isActive ? {color: this.activeColor} : {}
    }
  },
  methods: {
    itemClick() {
      this.$router.replace(this.path)
    },

  }
}
</script>

<style scoped>
.tab-bar-item {
    flex: 1;
    text-align: center;
    height: 49px;
    font-size: 14px;
}

.tab-bar-item img {
  width: 24px;
  height: 24px;
  margin-top: 3px;
  /* 清除图片下的3px默认占位 */
  vertical-align: middle;
  margin-bottom: 2px;
}

</style>